论文标题
重新思考$α$ -rucl $ _3 $
Rethinking $α$-RuCl$_3$
论文作者
论文摘要
我们认为，一些经验约束强烈限制了有效的微观旋转模型的参数，描述了$α$ -rucl $ _3 $。特别是，这种约束决定了一个实质性的\ emph {stauth} off-diagonal各向异性耦合，$γ^\ prime \！> \！0 $，以前几乎没有预期。量子波动的重新归一化允许将较大的裸参数的较大值与其较早的评估相协调，并在顺磁相中对旋转激发的场演变进行了一致的描述。我们断言，大型各向异性术语不可避免地会导致强烈的磁子的强烈无谐耦合，这必然导致其光谱中的广泛特征，这与$α$ -rucl $ _3 $的观察结果一致。使用二元转换，我们解释了伪金石模式的起源，该模式无处不在，该模式无处不在，并以$α$ -RUCL $ _3 $存在。我们的分析提供了$α$ -rucl $ _3 $的描述，作为一种易于平面的Ferromagnet，具有反铁磁性的更邻苯和强烈的偏离式耦合，在波动的Zigzag基态下，与不连续的阶段相邻，与Ferromagnetic notic fereromagnetic notic fermememememagnation相连。
We argue that several empirical constraints strongly restrict parameters of the effective microscopic spin model describing $α$-RuCl$_3$. In particular, such constraints dictate a substantial \emph{positive} off-diagonal anisotropic coupling, $Γ^\prime\!>\!0$, not anticipated previously. The renormalization by quantum fluctuations allows to reconcile larger values of the advocated bare parameters with their earlier assessments and provides a consistent description of the field evolution of spin excitations in the paramagnetic phase. We assert that large anisotropic terms inevitably result in strong anharmonic coupling of magnons, necessarily leading to broad features in their spectra due to decays, in accord with the observations in $α$-RuCl$_3$. Using duality transformations, we explain the origin of the pseudo-Goldstone mode that is ubiquitous to the studied parameter space and is present in $α$-RuCl$_3$. Our analysis offers a description of $α$-RuCl$_3$ as an easy-plane ferromagnet with antiferromagnetic further-neighbor and strong off-diagonal couplings, which is in a fluctuating zigzag ground state proximate to an incommensurate phase that is continuously connected to a ferromagnetic one.
